Multiply: (3x−1)(3x+1)(3x - 1)(3x + 1)(3x−1)(3x+1).
9x2+19x^2 + 19x2+1
6x2−16x^2 - 16x2−1
9x2−6x−19x^2 - 6x - 19x2−6x−1
9x2−19x^2 - 19x2−1